<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>state的简写</title>
</head>
<body>
  <!--准备好一个 div-->
  <div id="test"></div>

  <!--引入 react 核心库-->
  <script type="text/javascript" src="../js/16.8.4/react.development.js"></script>
  <!--引入 react-dom 用于支持 react 操作 DOM-->
  <script type="text/javascript" src="../js/16.8.4/react-dom.development.js"></script>
  <!--引入 babel 用于将 jsx 转为 js-->
  <script type="text/javascript" src="../js/16.8.4/babel.min.js"></script>

  <script type="text/babel">
    // 1.创建组件
    class Weather extends React.Component{
      // 初始化状态
      state = {isHot:false,wind:'微风'}
      render(){
        const {isHot,wind} = this.state
        return <h1 onClick={this.changeWeather}>今天天气很{isHot ? '炎热' : '凉爽'},{wind}</h1>
      }
      // 自定义方法-----要用赋值语句的形式+箭头函数
      changeWeather = ()=>{
        const isHot = this.state.isHot
        this.setState({isHot:!isHot})
      }
    }
    // 2.渲染组件到页面
    ReactDOM.render(<Weather/>,document.getElementById('test'))

  </script>
</body>
</html>
